public XamarinFormsWebViewSamplePage()
{
InitializeComponent();
var serializer = new JsonSerializer();
var webView = new HybridWebView(serializer)
{
VerticalOptions = LayoutOptions.FillAndExpand,
Margin = new Thickness(20, 30),
Uri = new Uri(WebViewUrl)
};
webView.RegisterCallback(LoginCallback, (arg) =>
{
var loginForm = serializer.Deserialize <LoginFormDto>(arg);
var result = loginForm.Username == Username;
webView.CallJsFunction(DisplayLoginAlertFunctioName, new[] { result.ToString() });
});
Content = webView;
}
protected override bool OnBackButtonPressed()
{
webView.CallJsFunction("goBack");
return(true);
// if (browser.CanGoBack)
// {
// // Task<string> task = Task.Run<string>(async () => await GetValueFromTextbox());
// // var cccc = task.Result;
// browser.GoBack();
// return true;
// }
// return true;
// //else return base.OnBackButtonPressed();
//}
//void OnNavigating(object sender, WebNavigatingEventArgs args)
//{
// // Checking if we are at the home page url
// // browser.CanGoBack does not seem to be working (not updating in time)
// NavigationPage.SetHasNavigationBar(this, args.Url != Url);
}
// I'm so insanely mad that I need to even do this…. The problem is that the Android
// renderer for the HybridWebView does not marshal back to the UI thread when the
// native function is complete at that causes Android to fail on Lollipop+. Since building
// my own version of HybridWebView is insanely hard and subclassing the existing one is
// impossible, we have our *2 version of this method which works the same way but puts
// the callback onto the right flippin thread!
public static void RegisterNativeFunction_Custom(this HybridWebView hybridWebView, string name, Func <string, object[]> func)
{
hybridWebView.RegisterCallback(name, (s) =>
{
// Get the appended callback ID
var index = s.LastIndexOf('!');
var callbackId = s.Substring(index + 1);
s = s.Substring(0, index);
Task.Run(() =>
{
// Run the native function
var args = func(s);
// The magic that was missing from the original...
Device.BeginInvokeOnMainThread(() =>
{
hybridWebView.CallJsFunction("nativeFuncs2[" + callbackId + "]", args);
});
});
});
}
private void loadHtml(object sender, EventArgs e)
{
hybrid.CallJsFunction($"loadHtml", _html);
}
void OnCallJavaScriptButton1Clicked(object sender, EventArgs e)
{
webView.CallJsFunction("Etherify.Eth.createRandom12Words", "");
}
public void SetHookekEthereumHost(string value)
{
//TODO Validate url in 'value' parameter. Ex: http://hookedethereum:8545
_hybridWebView.CallJsFunction(EhterifyNamespacePrefix + "setHookekEthereumHost", value);
}
